I stood up and, still holding my hard penis, walked over to her. I put my arm on her shoulder. 'It's OK if you want to stop, Audrey. If you're changing your mind, I understand. This is some heavy stuff going on! I think we both went a little too far.' I looked at her, smiling. I really didn't want to stop; this was the hottest thing that ever happened to me. But I also truly did not want to hurt my sister.

'But that's just it, Matt, I don't know...This is soooo great, but...' She was deeply conflicted and looked like she was about to burst into tears. I...